Pereira, J.A.Torres, L.Cabanas, J.E.Bento, Albino2011-06-302011-06-301998Pereira, J.A.; Torres, L.; Cabanas, J.; Bento, A., 1998. Parasitoids of black scale Saissetia oleae (Oliv.) (Hom.: Coccidae) on olives in North-eastern, Portugal. XIVth International Plant Protection Congress. Jerusalém, de 25 a 30 de Julho de 1999. Resumo.http://hdl.handle.net/10198/5531The black scale, Saissetia oleae Oliv. (Hom.: Coccidae) is a major pest of olives in north-eastern region of Portugal. ln the present work the results of a study on the parasitism of the various stages of the pest or trees in the above-mentioned region are reported. Methods: The study was carried out in 1997 and 1998 at, respectively, 120 and 183 sites distributed throughout the region. The samples were taken between the end of summer and the beginning of autumn.engconference object